Theres that illegal shotgun again.
Under the National Firearms Act (NFA) it is illegal for a private citizen to possess a sawed-off modern smokeless powder shotgun (a barrel length less than 18 in. or 46 cm and an overall length less than 26 inches) without a tax-stamped permit from the Bureau of Alcohol, Tobacco, Firearms and Explosives, which requires a background check and a $200.00 fee for every transfer. However, if the weapon was manufactured by a licensed builder, with a short barrel and no stock, the transfer fee is $5. [1] (Short-barreled muzzleloading blackpowder shotguns, in contrast, are not illegal by federal law and require no tax-stamped permit, although they may be illegal under state law.) As with all NFA regulated firearms, a new tax stamp must be purchased before every transfer. Inter-state transfers must be facilitated through a Class III Federal Firearms Licensed (FFL) dealer while intrastate transfers may be between two persons.[6]